Anais da Academia Brasileira de Ciências | |
Fluoride characterization by principal component analysis in the hydrochemical facies of Serra Geral Aquifer System in Southern Brazil | |
Arthur Nanni2  Ari Roisenberg1  Jandyra M.g. Fachel1  Gilberto Mesquita1  Cristiano Danieli1  | |
[1] ,UFRGS Instituto de Geociências Departamento de GeoquímicaPorto Alegre RS ,Brasil | |
关键词: fractured aquifer; geostatistics; GIS; groundwater; hydrogeology; aqüífero fraturado; geoestatística; SIG; águas subterrâneas; hidrogeologia; | |
DOI : 10.1590/S0001-37652008000400010 | |
来源: SciELO | |
【 摘 要 】
Principal component analysis is applied to 309 groundwater chemical data information from wells in the Serra Geral Aquifer System. Correlations among seven hydrochemical parameters are statistically examined. A four-component model is suggested and explains 81% of total variance. Component 1 represents calcium-magnesium bicarbonated groundwaters with long time of residence. Component 2 represents sulfated and chlorinated calcium and sodium groundwaters; Component 3 represents sodium bicarbonated groundwaters; and Component 4 is characterized by sodium sulfated with high fluoride facies. The components' spatial distribution shows high fluoride concentration along analyzed tectonic fault system and aligned on northeast direction in other areas, suggesting other hydrogeological fault systems. High fluoride concentration increases according to groundwater pumping depth. The Principal Component Analysis reveals features of the groundwater mixture and individualizes water facies. In this scenery, it can be determined hydrogeological blocks associated with tectonic fault system here introduced.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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